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Authors
Advisor(s)
Abstract(s)
A presente dissertação foi desenvolvida no âmbito da disciplina Dissertação/Estágio. O
estágio curricular decorreu em ambiente empresarial, teve uma duração de 10 meses, de setembro
a junho de 2022, e teve lugar numa das unidades industriais da Amorim Cork, S.A., a Unidade
Industrial de Lamas.
O efeito do tratamento da cortiça no desempenho técnico de rolhas foi um dos principais
objetivos. Dentro deste tema foram efetuados vários estudos que passaram pela avaliação das
características das rolhas de cortiça que podem influenciar a sua degradação e consequentemente
o seu desempenho. Foi, também, avaliado o desempenho técnico de rolhas de cortiça submetidas
aos novos processos de tratamento de remoção de TCA desenvolvidos pela Amorim Cork, S.A.,
Naturity®
e Xpür®
. A análise dos resultados foi realizada usando o software Statistical Package
for the Social Sciences (SPSS®
) da IBM®
.
A análise das características das rolhas de cortiça que podem influenciar a sua
degradação/desintegração foi dividida em três parte. O primeiro estudo consistiu em avaliar
parâmetros físico-mecânicos, de rolhas em garrafa, expostas a duas condições de temperatura, ao
longo do tempo. Durante a experiência não ocorreu a desintegração de nenhuma das rolhas,
contudo, observaram-se quebras na extração manual das rolhas, que pode ser visto como um
indicador da evolução das mesmas. O segundo estudo permitiu avaliar rolhas com alguns anos de
estágio em garrafa. Os ensaios físico-mecânicos realizados não permitem prever um mau
desempenho das rolhas, nem um comportamento de desintegração. Por fim, avaliou-se o impacto
de alguns defeitos críticos da cortiça, nomeadamente barro e bofe. Os resultados obtidos parecem
evidenciar um pior desempenho das rolhas de cortiça que apresentavam os defeitos referidos.
Os processos de tratamento Naturity®
e Xpür®
provocam uma redução de humidade nas
rolhas. As rolhas Xpür®
foram avaliadas em stock e em garrafa. As rolhas Naturity®
foram apenas
avaliadas em garrafa. A partir dos resultados obtidos nos parâmetros analisados nas rolhas Xpür®
é possível concluir que a redução de humidade no tratamento não tem um impacto no seu
desempenho técnico. Já as rolhas Naturity®
, ao fim de um ano, apresentam um aumento do teor
de absorção e da progressão capilar do vinho nas amostras em estudo, o que é expectável devido
ao tempo que permaneceram em garrafa. A partir destes resultados é possível afirmar que o
processo patenteado Xpür®
remove o TCA das rolhas técnicas sem colocar em causa o seu
desempenho.
This dissertation was developed within the scope of the “Dissertação/Estágio” discipline. The curricular internship took place in a business environment, lasted 10 months, from September to June 2022, and took place in one of the industrial units of Amorim Cork, S.A., the Industrial Unit of Lamas. The effect of cork treatment on the technical performance of stoppers was one of the main objectives. Within this theme, several studies were carried out which included the assessment of the characteristics of cork stoppers that may influence their degradation and consequently their performance. The technical performance of cork stoppers submitted to the new TCA removal treatment processes developed by Amorim Cork, S.A., Naturity® and Xpür®, was also assessed. The results were analyzed using the Statistical Package for the Social Sciences (SPSS®) software of IBM®. The analysis of the characteristics of cork stoppers that may influence their degradation/disintegration was divided into three parts. The first study consisted in evaluating the physical-mechanical parameters of bottle corks exposed to two temperature conditions over time. During the experiment disintegration of any of the corks occurred, however, breaks were observed in the manual extraction of the corks, which can be seen as an indicator of the evolution of the corks. The second study allowed for the evaluation of several years old corks in a bottle. The physical-mechanical tests do not allow for the prediction of poor performance of the corks, no disintegration behavior. Finally, the impact of some critical cork defects was evaluated, namely clay and bofe. The results obtained seem to show a worse performance of the cork stoppers presenting these defects. The Naturity® and Xpür® treatment processes cause a reduction of humidity in the corks. Xpür® stoppers were evaluated in stock and in a bottle. Naturity® stoppers were only evaluated in bottles. From the results obtained in the parameters analyzed in the Xpür® stopper, it is possible to conclude that the reduction of humidity in the treatment does not have an impact on their technical performance. The Naturity® stoppers, on the other hand, after one year, show an increase in the absorption content and capillary progression of the wine in the samples under study, which is expected due to the time they have remained in the bottle. Based on these results, it is possible to state that the patented Xpür® process removes TCA from technical corks without compromising their performance.
This dissertation was developed within the scope of the “Dissertação/Estágio” discipline. The curricular internship took place in a business environment, lasted 10 months, from September to June 2022, and took place in one of the industrial units of Amorim Cork, S.A., the Industrial Unit of Lamas. The effect of cork treatment on the technical performance of stoppers was one of the main objectives. Within this theme, several studies were carried out which included the assessment of the characteristics of cork stoppers that may influence their degradation and consequently their performance. The technical performance of cork stoppers submitted to the new TCA removal treatment processes developed by Amorim Cork, S.A., Naturity® and Xpür®, was also assessed. The results were analyzed using the Statistical Package for the Social Sciences (SPSS®) software of IBM®. The analysis of the characteristics of cork stoppers that may influence their degradation/disintegration was divided into three parts. The first study consisted in evaluating the physical-mechanical parameters of bottle corks exposed to two temperature conditions over time. During the experiment disintegration of any of the corks occurred, however, breaks were observed in the manual extraction of the corks, which can be seen as an indicator of the evolution of the corks. The second study allowed for the evaluation of several years old corks in a bottle. The physical-mechanical tests do not allow for the prediction of poor performance of the corks, no disintegration behavior. Finally, the impact of some critical cork defects was evaluated, namely clay and bofe. The results obtained seem to show a worse performance of the cork stoppers presenting these defects. The Naturity® and Xpür® treatment processes cause a reduction of humidity in the corks. Xpür® stoppers were evaluated in stock and in a bottle. Naturity® stoppers were only evaluated in bottles. From the results obtained in the parameters analyzed in the Xpür® stopper, it is possible to conclude that the reduction of humidity in the treatment does not have an impact on their technical performance. The Naturity® stoppers, on the other hand, after one year, show an increase in the absorption content and capillary progression of the wine in the samples under study, which is expected due to the time they have remained in the bottle. Based on these results, it is possible to state that the patented Xpür® process removes TCA from technical corks without compromising their performance.
Description
Keywords
cork stoppers degradation critical defects Naturity® Xpür®